.app-name{
  text-align: center;
  font-size:24px;
  color:#111;
  margin:100rpx 0;
}
.btn{
  width: 200rpx;
  height: 60rpx;
  line-height: 60rpx;
  text-align: center;
  background: #2172EE;
  font-size:26rpx;
  color:#fff;
  border-radius:5px;
  margin:0 auto;
}